For MSPA US National String V1 the following fields should have the corresponding lengths
SensitiveDataProcessing | N-Bitfield(2,12)
KnownChildSensitiveDataConsents | N-Bitfield(2,2)
When the strings are generated in the UI, they return strings where the following fields have length
SensitiveDataProcessing | N-Bitfield(2,16)
KnownChildSensitiveDataConsents | N-Bitfield(2,3)
This would be valid if the version was set to 2, however the GPP site hardcodes the version for each MSPA string to 1.